/Engine/Source/Editor/AnimationBlueprintLibrary/Public/AnimPose.h
Returns the weight of an evaluated curve - if found
Curve weight value, if found - 0.f otherwise
static float GetCurveWeight ( const [FAnimPose](API\Editor\AnimationBlueprintLibrary\FAnimPose) & Pose, const [FName](API\Runtime\Core\UObject\FName) & CurveName )